Ghaeles s



' (No Model) 0. s. POOS.

MEANS FOR VENTILATING BOW WINDOWS.

. Patented Jan. 1, 1884.

R I- S m Y I I A W I W! I I I V m. l m. V V ,w F w J m 2 n M J I I I m m I 2,. Ml APR g 59A IA T 1 m fi IIPZE 8 1 W 6 To aZZ whom, it 12mg concern:

citizen of the United States. residing at Baltibazaars and other places of business; and the isprevented, as well as the excessive condensaincluding one of the lines belonging thereto.

1 projecting therefrom, and having glass front in two hinged sections, all these parts being G, leading inward and conducted in any convenient manner to one of the fines D of the I ure upon the glass of the window, by which obstructed.

at any convenient point, I form an opening,

Unmet) STATES PATENT @FFIQE.

CHARLES s. noos, OF BALTIMORE, MARYLAND, ASSIGNOR on ONE-HALF TO WILLIAM H. CLIFFORD, on SAME PLACE.

MEANS FOR VENT ILATING BOW-WINDOWS.

. SPECIFIGATION forming part of Letters Patent No. 291,322, dated January 1, 188%.

' Application tiled September 8, 1883. No model.)

Be it known that 1, CHARLES S. Foos, a

more, in the State of Maryland, have invented new and useful Improvements in Means for Ventilating Bow-NVindows, of which the following is a specification.

My invention relates to show-windows for purpose thereof is to provide means for maintaining such a constant circulation of air through the same as will effectually prevent the condensation and congelation of moistthe view of the articles exhibited therein is To this end, therefore, my invention con sists in the combination, with the sill of a showwindow, of a ventilator having its air-pipe connected with a flue of the building. whether the same be a furnace or other fine, whereby the cooler air at the bottom is carried away, permitting the warmer currents to flow in at the top and descend, the constant circulation thus established keeping the air dry and raising the temperature above the freezing-point, whereby accumulation of frost upon the glass tion of moisture from the inner air.

Referring to the drawing, the figure is a central vertical section. taken through the window and through a portion of the building,

A in said drawings designates the outer wall of the building, and B the show-window and sides, with an inner glass door formed of the usual construction.

0 indicates the flooring of the building, and

Within the bottom or sill E of the window,

in which is placed a ventilating-funnel, F, to which is connected an air-conducting pipe,

. nm of air, and an exit in the lower porbuilding. which may be a furnace-flne or otherwise; or. if desired, a vertical air-pipe may be employed, discharging at or near the top of the building. If reqnired, openings may be formed within the inner wall of the windowas, for example, at a-to admit a flow of air from the interior of the building; but this constitutes no essential part of my in vention.

The function of the parts described is as follows: The colder currents of air, which settle to the lower part of the window, pass into the pipe G, and thence into the flue 'D, by which they are carried off A circulation of air is thus created, the warm stratum of air which rises to the top of the room or apartment 0 of the building flowing into the space inclosed by the window, through a suitable opening or passageway, 01?, at the upper portion of the inner door to the window, such inflowing stratum of warm air taking the place of the air passing out through the pipe G. By this means the temperature is increased and the condensation of moisture upon the glass and its congelation thereon are avoided, and the window is kept clear, so that its contents may be plainly seen in all weathers. Where more than one window is located within the I same building branch pipes may conduct from 0 tion of the window for the'escape of air, a circulation being thus created through the window. substantially as and for the purpose set forth.

2. The combination, with a show-window, of an air-escape pipe entering the bottom or sill of said window and leading to a fine or In testimonywvhereof I have hereunto set air-escape which communicates with the open I my hand in the presence of two subscribing IO air at or near the top of the building, subwitnesses.

stantially as described. 3. The combination, with the show-windoxv A, of the ventilating-funnel F, entering the XVitnessesr sill 0f the Window, the ainpipe G. and an air- 1 JAMES L. NORRIS,

conduit D, substantially as described. I A. H. NORRIS.

CHARLES S. FOOS. 

